The stunt sparked a wave of anger on Twitter.
The masks, reading “Stop killing Black people,” were meant to quell the spread of the coronavirus, which has disproportionately affected Black Americans.
Two police officers have been suspended after disturbing video of the incident offers a glimpse at how police are responding to peaceful demonstrations.
As soon as 8 p.m. struck, NYPD officers began to arrest, charge and beat nonviolent protesters.
The letter also attacks former Defense Secretary Jim Mattis for criticizing the president.
"If you have a pulse, I’m with you!” the president tweeted in his attack on Alaska Republican Sen. Lisa Murkowski.
Sen. Cory Booker made an emotional plea for the Kentucky Republican to yield his objections.
“The president has clearly forgotten how it actually happened or is confused,” Trump's former chief of staff said.
This is the second time this week he's made the call and broken from Trump on the need for a military response to the anti-racism protests.
“Remember the date," retired four-star general John Allen warned in a withering editorial about President Donald Trump.